Compatibility List

By default there is no true OS image installed on Braveheart phones. An SD card
with a bootable image needs to be inserted into the phone. See section 12 below
for a list of OS options. Note the SD and sim sockets are stacked on each other
The SD slot is the "shallower" socket and the SIM card goes in the "deeper"
socket.
Some videos that illustrate the process:
Excellent first time guide video from Rob Braxman Tech
Flash an OS to microSD card video from Rob Braxman Tech
Specifications
Dimensions:
160.5 x 76.6 x 9.2mm
Weight:
Between 180-200 grams
SIM Card:
Micro-SIM
Display:
Size:
5.95 inches (151mm) diagonal
Type:
HD IPS capacitive touchscreen, 16M colors
Resolution:
1440x720, 18:9 ratio
System on Chip:
Allwinner A64
RAM:
2GB LPDDR3 SDRAM
Internal Storage:
16GB eMMC, extendable up to 2TB via microSD, supports SDHC and
SDXC
Back Camera:
Single
5MP, 1/4", LED Flash
Selfie Camera:
Single 2MP, f/2.8, 1/5"
Sound:
Loudspeaker, 3.5mm jack & mic (jack doubles as hardware UART if
killswitch 6 is deactivated)
Communication: EG25-G
LTE: B2, B4, B5, B7
WCDMA: B2, B4, B5
GSM: 850, 1900 (MHz)
WLAN: Wi-Fi 802.11 b/g/n, single-band, hotspot
Bluetooth: 4.0, A2DP
GNSS: GPS/GLONASS/BeiDou/Galileo/QZSS, with A-GPS
Sensors:
Accelerometer, gyro, proximity, ambient light, compass
Killswitches:
Modem, Wifi & Bluetooth, Microphone, Cameras
Battery
:
Lithium ion Rated Capacity 2800mAh (10.64Wh), Typical Capacity 3000mAh
(11.40Wh) (nominally replaceable with any Samsung J7 form-factor battery)
I/O:
USB Type-C (Sli
mPort), USB Host, DisplayPort Alternate Mode output, 15W 5V
3A Quick Charge, follows USB PD specification